I'm trying to use JetBrains Gateway to work on a project and it was working for several weeks, but today the IDE has never loaded the code, despite saying that it's connected. Instead it shows a red ping warning. I've tried connecting to the server from several different internet connections. SSH seems to be working fine.
I ended up getting it working by restarting the Linux machine with
sudo systemctl start reboot.target. I'm still seeing the ping error but the code is at least loading in the Gateway IDE.